One of the applications that comes with Synchronet is a Java Telnet Applet. The Java Telnet Applet (jta) is already a standard packaage in Debian: will neeed to investigate the use of that version of jta, instead of the version that is distributed with Synchronet.
Note that because the existing JTA that is distributed with Synchronet is it's own distribution it also has it's own copyright related files. This causes the following Lintian warnings to come up;
W: synchronet: extra-license-file usr/share/synchronet/web/root/telnet/COPYING
W: synchronet: extra-license-file usr/share/synchronet/web/root/telnet/COPYING.LIB